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Sia In Carpool Karaoke

Clearly disinterested in heading into work, who does The Late Late Show host James Corden bump into while driving around in LA but Sia?! This time, it's the Aussie singer's turn at Carpool Karaoke.

Hiding her face beneath an oversized black and white wig which she'd begun wearing with the launch of her new album This Is Acting, Sia revealed to James her eye-covering hairpiece was intended to keep her shielded from cameras.

"I don't wear this unless there's cameras around. I only wear this just to try and maintain a modicum of privacy," she said. "I thought, 'What doesn't exist in pop music at the moment?' And it was mystery."

Watch the clip above to see what Sia has to say about aliens and singing Chandelier, Elastic Heart, Alive, Titanium and Diamonds with James!